Oct 14, 2022 · What are hives? Hives are raised red bumps (welts) or splotches on the skin. They’re a type of swelling on the surface of your skin and happen when your body has an …

Mar 16, 2024 · Hives are itchy welts that can appear anywhere on your skin and sometimes last minutes or days. They may be a sign of serious issues, especially if you have trouble breathing.

Jul 18, 2023 · Hives, or urticaria, are itchy, raised welts that are found on the skin. Hives are often caused by an allergic reaction. Learn the signs and how to identify them.

Dec 8, 2025 · Hives, also known as urticaria, are raised, itchy welts on your skin that occur due to an allergen. The reaction is uncomfortable, but it’s often not serious.

Hives can appear anywhere on the surface of the skin. Whether the trigger is allergic or not, a complex release of inflammatory mediators, including histamine from cutaneous mast cells, …

Aug 6, 2025 · Summary Hives are red and sometimes itchy bumps on your skin. An allergic reaction to a drug or food usually causes them. Allergic reactions cause your body to release …

Sep 24, 2024 · Hives, also called urticaria, are circumscribed swellings on the skin that often are itchy. Often they are pink or red, but they don't have to be. Hives happen when the cells in the …

Hives, also called urticaria, are a raised, itchy area of skin. Learn the types, causes, symptoms, diagnosis, treatment, and complications of hives, as well as see pictures of them.

Oct 27, 2023 · Hives — also known as urticaria (ur-tih-KAR-e-uh) — is a skin reaction that causes itchy welts that range in size from small spots to large blotches. Hives can be triggered by …

Sep 11, 2025 · Hives arise due to the activity of skin cells and the release of histamine. Your immune system releases this chemical in response to an allergen, which causes symptoms. …